[fetchmail-users] non-default "mailbox selection failed"

[Travis O. <tr...@ws...>]

Hello, I am trying to use fectchmail to fetch the contents of a folder
(.spam.missed/) from my courier-imap server so that I can send the
messages to spamassassin's learning program.  Using this as a guide:
http://wiki.apache.org/spamassassin/SingleUserUnixInstall#Enable_IMAP_LearnAsSpam_folder

When I invoke
$ /usr/bin/fetchmail -a -v -n --folder /home/USER/.maildir/.spam.missed/
-m '/usr/bin/sa-learn -D --spam' --fetchmailrc /home/USER/.spamtrainingpoprc

I get this:
[snip]
fetchmail: IMAP> A0004 LOGIN "USER" *
fetchmail: IMAP< A0004 OK LOGIN Ok.
fetchmail: IMAP> A0005 SELECT "/home/USER/.maildir/.spam.missed/"
fetchmail: IMAP< A0005 NO Mailbox does not exist, or must be subscribed to.
fetchmail: mailbox selection failed
fetchmail: IMAP> A0006 LOGOUT
fetchmail: IMAP< * BYE Courier-IMAP server shutting down
fetchmail: IMAP< A0006 OK LOGOUT completed
fetchmail: client/server synchronization error while fetching from
US...@do...d
fetchmail: 6.3.21 querying domain.tld (protocol IMAP) at Thu May 24
13:21:13 2012: poll completed
fetchmail: Query status=7 (ERROR)
fetchmail: normal termination, status 7

This is the fetchmailrc file I set up (to not conflict with my main
fetchmail file which works fine)

== ~/.spamtrainingpoprc ==
# used by spamassassin to train Bayes
poll domain.tld protocol IMAP:
user USER with password PASSWORD
=================


== system info ==
OS: gentoo
gcc version 4.4.5 (Gentoo 4.4.5 p1.3, pie-0.4.5)
fetchmail 6.3.21+RPA+NTLM+SDPS+SSL+NLS
courier-imap-4.5.0
=================

Any thoughts?  Thank you in advance.

-- Travis